Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 2American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 65
... tether , the risk of consecutive fatigue failures and the risk of progressive collapse of other tethers are assessed . The failure probability of the platform is calculated on the loss of one tension leg ; each tension leg being ...
... tether , the risk of consecutive fatigue failures and the risk of progressive collapse of other tethers are assessed . The failure probability of the platform is calculated on the loss of one tension leg ; each tension leg being ...
Page 68
... tether midpoint is bending , which corresponds to 14 % of the total stress , the loading along the tether can be expressed by considering the parabolic distribution of the bending stress as a function of d o ( 8 ) = max ( 0.86 +0.568 ...
... tether midpoint is bending , which corresponds to 14 % of the total stress , the loading along the tether can be expressed by considering the parabolic distribution of the bending stress as a function of d o ( 8 ) = max ( 0.86 +0.568 ...
Page 69
Upon the first tether failure , the axial variable stress in the remaining tethers in the same leg increases by a ... tether in 41 years is calculated as 2.30 10-3 ; while that in 40 years is 1.68 10-3 . Therefore , the failure ...
Upon the first tether failure , the axial variable stress in the remaining tethers in the same leg increases by a ... tether in 41 years is calculated as 2.30 10-3 ; while that in 40 years is 1.68 10-3 . Therefore , the failure ...
Contents
Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |
OFFSHORE TECHNOLOGY PART | 33 |
Extreme Forces on Large AxiSymmetric Offshore Structures in Directional Seas | 49 |
Copyright | |
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amplitude applied assessment assumed axial basic variables behaviour calculated coefficient component computed considered corrosion cost crack depth crack growth rate CTOD curve defect deterministic drag force effects Engineering environmental equation estimated evaluated extreme failure mode failure probability fatigue crack growth fatigue damage fatigue failure fatigue reliability fatigue strength Figure fracture mechanics fracture toughness frequency Gaussian geometry hindcast initial inspection instability load integration limit state function linear Lognormal LRFD material maxima maximum mean value method nonlinear normal normal distribution North Sea obtained offshore structures parameters platform predicted pressure probabilistic probability density function probability distribution quadratic random variable ratio reliability analysis reliability index residual stresses response risk S-N curve safety sea-state significant wave height simulation spectral standard deviation statistical stochastic storm stress intensity factor stress range Table tension tether tubular joints variation vector weld weldments